add logs

Author: sakthivelmanii

google-cloud-spanner/src/main/java/com/google/cloud/spanner/MultiplexedSessionDatabaseClient.java

@@ -567,6 +567,7 @@ MultiplexedSessionMaintainer getMaintainer() {
   }
 
   ApiFuture<SessionReference> getCurrentSessionReferenceFuture() {
+    System.out.println("Accessing Multiplexed Session " + Instant.now());
     return ApiFutures.catchingAsync(
         this.multiplexedSessionReference.get(),
         Throwable.class,
@@ -583,6 +584,7 @@ private void maybeRetrySessionCreation() {
       if (isValid()
           && isMultiplexedSessionsSupported()
           && retryingSessionCreation.compareAndSet(false, true)) {
+        System.out.println("Retrying Multiplexed Session " + Instant.now());
         SettableApiFuture<SessionReference> settableApiFuture = SettableApiFuture.create();
         asyncCreateMultiplexedSession(settableApiFuture);
         multiplexedSessionReference.set(settableApiFuture);

google-cloud-spanner/src/main/java/com/google/cloud/spanner/SessionClient.java

@@ -27,6 +27,7 @@
 import com.google.common.collect.ImmutableMap;
 import com.google.common.collect.Maps;
 import io.opentelemetry.api.common.Attributes;
+import java.time.Instant;
 import java.util.ArrayList;
 import java.util.Collections;
 import java.util.List;
@@ -271,6 +272,7 @@ void createMultiplexedSession(SessionConsumer consumer) {
    * GRPC channel. In case of an error during the gRPC calls, an exception will be thrown.
    */
   SessionImpl createMultiplexedSession() {
+    System.out.println("Creating Multiplexed Session " + Instant.now());
     ISpan span =
         spanner
             .getTracer()